<template>
  <div :id="id" :class="className" :style="{ height:height,width:width }" />
</template>

<script>
import echarts from "echarts";
import "echarts-wordcloud/dist/echarts-wordcloud";
import "echarts-wordcloud/dist/echarts-wordcloud.min";
export default {
  props: {
    className: {
      type: String,
      default: "chart",
    },
    id: {
      type: String,
      default: "chart",
    },
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "300px",
    },
    data: {
      type: Array,
      default: [],
    },
    title: {
      type: String,
      default: "",
    },
    sizeRange: {
      type: Array,
      default: ()=>[16, 30],
    },
  },
  data() {
    return {
      chart: null,
    };
  },
  mounted() {
    this.initChart();
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      this.chart = echarts.init(document.getElementById(this.id));
      const option = {
        title: {
          text: this.title,
          x: "center",
        },
        backgroundColor: "#fff",
        // tooltip: {
        //   pointFormat: "{series.name}: <b>{point.percentage:.1f}%</b>"
        // },
        series: [
          {
            type: "wordCloud",
            //用来调整词之间的距离
            gridSize: 10,
            //用来调整字的大小范围
            // Text size range which the value in data will be mapped to.
            // Default to have minimum 12px and maximum 60px size.
            sizeRange: [16, 36],
            // Text rotation range and step in degree. Text will be rotated randomly in range [-90,                                                                             90] by rotationStep 45
            //用来调整词的旋转方向，，[0,0]--代表着没有角度，也就是词为水平方向，需要设置角度参考注释内容
            // rotationRange: [-45, 0, 45, 90],
            // rotationRange: [ 0,90],
            rotationRange: [0, 0],
            //随机生成字体颜色
            // maskImage: maskImage,
            textStyle: {
              normal: {
                color: function (v) {
                  let color = ["#f9a825", "#8bc34a", "#ff8a80", "#015293","#168ff0","#015293","#2fbfe1","#ac9bf6","#4794f2"];
                  let num = Math.floor(Math.random() * (8 + 1));
                  return color[num];
                },
              },
            },
            //位置相关设置
            // Folllowing left/top/width/height/right/bottom are used for positioning the word cloud
            // Default to be put in the center and has 75% x 80% size.
            left: "center",
            top: "center",
            right: null,
            bottom: null,
            width: "100%",
            height: "100%",
            //数据
            data: this.data,
          },
        ],
      };
      this.chart.setOption(option);
    },
  },
  watch: {
    data: {
      handler(newVal, oldVal){
        console.log("监听：", newVal)
        if(this.chart){
          //销毁
          this.chart.dispose();
          if(newVal){
            this.initChart();
          } 
        } else{
          this.initChart();
        }
      },
      deep: true //对象内部属性的监听
    }
  }
};
</script>
<style lang='stylus' scoped>
.chartsClass {
  padding-left: 1.2rem;
}
</style>
</script>